Budgiesaurus t1_jb91n2z wrote
Reply to comment by igby1 in TIL the largest moon in our solar system, Ganymede, is larger than the planet of Mercury by Jugales
How do you expect anyone to proof this when NASA and the like are still at the stage where they think it likely has more water than the earth's surface. There are strong indications for it, but a random redditor doesn't have a space telescope lying around to verify the Hubble's findings, do they?
igby1 t1_jb93ie1 wrote
Not definitive proof but this has a good explanation why they think it has an underground ocean.
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